Question

the diagram shows part of lining of the human trachea

here what is Cell "X'' ?
and what is the function of cell'' X''?​

Answer 1

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The trachea, or windpipe, is a 5-inch long tube made of C-shaped hyaline cartilage rings lined with pseudostratified ciliated columnar epithelium. The trachea connects the larynx to the bronchi and allows air to pass through the neck and into the thorax. The rings of cartilage making up the trachea allow it to remain open to air at all times.